(b) It takes some time for rhodopsin to split into scotopsin and retinal and release of transmitter passing nerve impulse.
This is a case of adaptation.
(b) Cornea transplant in humans is almost never rejected. This is because it has no blood supply.
(a) Vulture, some other birds and man have acute vision.
Acute bird vision derives from the retina fovea that is densely packed with photoreceptor cones.
(c) Rod cells contain the pigment rhodopsin and are essential for vision in dim light.
Cone cells are specialized to transmit information about colour and are responsible for the visual acuity of the eye in bright light.
(b) Alzheimer disease in humans is associated with the deficiency of acetylcholine.
Acetylcholine plays a role in skeletal muscle movement, as well as in the regulation of smooth muscle and cardiac muscle.
(d) Rhodopsin contained in the rod type of photoreceptor cells of human eye is a derivative of vitamin A.
(c) Vestibular apparatus is a part of inner ear which has no role in hearing but responsible for the maintenance of balance of the body and posture.
(c) Retinal is a derivative of vitamin A.
Retinal is a polyene chromophore, and bound to proteins called opsins, is the chemical basis of animal vision.
(d) Fovea centralis is the most sensitive part of retina. It has high density of cones, but rods are not found.
(a) Vestibular apparatus has specific receptors called crista and macula to maintain the balance and posture of body.
